I remember not noticing slower frame rates for Starglider2 on the Amiga and that was having come from playing the ST version to death.It's a slower cpu yes but too tiny an increase to make any real difference when it comes gaming.

Most 3d games with the exception of Extensor(i like the ST version better) were better on Amiga for the simple fact that they sounded awesome and played exactly the same as the ST version anyway

St does have cute sound and some nice melodies but all the important stuff for games was only on Amiga.It doesn't change the fact that if you had an ST, then you would likely be very happy with it - providing you never saw an Amiga running the same games